Open AccessInterfacial bonding enhancement of the RTV recoating with sandwiched contaminant by plasma jet
Author(s) -
Wang Shanshan,
Li Shuang,
Li Jianjun,
Zhang Ruobing,
Liu Hui
Publication year - 2019
Publication title -
high voltage
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.732
H-Index - 20
ISSN - 2397-7264
DOI - 10.1049/hve.2019.0061
Subject(s) - materials science , composite material , silicone rubber , coating , fourier transform infrared spectroscopy , silicone , scanning electron microscope , layer (electronics) , adhesion , natural rubber , chemical engineering , engineering
Room temperature vulcanised (RTV) silicone rubber is widely used in electrical power system, applied to the glass or porcelain insulator surface to enhance insulation. RTV coatings get contaminated after long‐term operation and need to be recoated. Contaminants accumulate and embed into the surface of base RTV coating, forming a hard‐to‐remove inorganic transition layer. Such sandwiched contaminant layer destroys the adhesion between original and reapplied silicone rubber coating greatly. Authors’ study innovatively reports a method to enhance interfacial bond properties of the RTV recoating with sandwiched contaminant layer, by using an atmospheric‐pulsed discharge plasma jet (APPJ) for surface treatment. Water boiling test and 180‐degree peel test were conducted to evaluate interfacial bond properties macroscopically. Scanning electron microscopy (SEM) was applied to observe the cross‐section of recoating interface, while Fourier‐transform infrared spectroscopy (FTIR) to detect chemical changes of contaminant layer, giving out microscopic and theoretical explanation.